time of the essence

基本解释

The goal is for a soldier to forge alliances in unknown territory where every move is being carefully watched, time is of the essence and a faction is very much interested in the soldier's failure.
培训的目的是让军人在一个不熟悉的国家寻求到盟友，在那种环境下，每一步都必须小心应对，时间至关重要，而内讧往往导致任务失败。
When time is of the essence, we cannot afford to have the life-saving supplies going to the wrong places.
时间就是生命，我们不可以将拯救生命的用品调运到错误的地方。
When time is of the essence, try importing a single compressed file.
如果时间很重要，则尽量导入单个的压缩文件。

"Well,this is critical," "The risk of defeat goes up during this time because you have got, in essence,a political campaign.
Remember last time, I said that there's different kinds of complexity in our code, and I suggested for simple branching programs, the amount of time it takes to run that program is, in essence, bounded by the number of instructions, because you only execute each instruction at most once.
但是这里有个很重要的点,记得上节课，我提过在我们的代码中，有不同种类的复杂度，而且我还说了对于简单的分支程序,运行这种程序需要的总体时间,大体上，是和指令的数目相关的,因为每个指令只会被执行最多一次。
麻省理工公开课 - 计算机科学及编程导论课程节选
This is the essence of this case. We will try to remind all the time that this is the issue, this is the topic.

Yes, we're telling you to add in a lot of features, but time is of the essence, and the next generation of TiVo hardware with tru2way support needs to hit shelves soon.
ENGADGET: Ten years of TiVo: how far we haven't come